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Quality assessment of included studies.
| Author, year | Generation of allocation sequence | Allocation concealment | Blindness | Withdrawal and drop-out | Jadad scorea | (Refs.) |
|---|---|---|---|---|---|---|
| Bernard, 1997 | 2 | 2 | 2 | 1 | 7 | (24) |
| Domenighetti, 1997 | 1 | 1 | 2 | 1 | 5 | (25) |
| Moradi, 2009 | 1 | 1 | 0 | 1 | 3 | (18) |
| Ortolani, 2000 | 1 | 1 | 0 | 1 | 3 | (15) |
| Suter, 1994 | 1 | 1 | 2 | 1 | 5 | (26) |
The Jadad scale score ranges from 1 to 7; a higher score indicates better a quality of a randomized controlled trial.
